Grinding wheel



A. P. BEEBE June 30, 1931.

GRINDING WHEEL Filed Sept. 22, 1930 l} ATTORNEY! 25 ment to the metallicbacking.

Patented June 30, 1931 UNITED STATES PATENT OFFICE.

ALAN P. BEEIBE, OI DETROIT, MICHIGAN, ASSIGNOR TO THE PENINSULARGRINDING WHEEL COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGANGRINDING WHEEL Application filed September 22, I930. Serial No. 483,618.

The invention relates to grinding wheels of that type in which a flatdisk of the abrasive material is secured to a revoluble metal backingplate. It is the primary object of the in- 5; vention to obtain agreater strength both in the Wheel and its attachment to the backingplate and to this end the invention consists in the construction ashereinafter set forth.

In the drawings:

Figure 1 is a sect-ion through the .abrasive wheel and the backing plateto which it is to be attached;

Figure 2 is an elevation of the reinforcement for the abrasive memberwith the scv curing sockets attached thereto.

tendency to rupture under centrifugal force.

With face grinding wheels it. is a lso customary to imbed securingnutsin the plastic material Which form the anchors engaged by the clampingbolts for securing the abrasive eleln my improvedconstruction I("Ol'DlJllH these features in such a manner as to increase theirelliciency in performing both functions. This is accomplishedby weldingor otherwise rigidly securing to an open mesh metallic enforcement aseries of nuts or anchors and subsequently imbedding the reinforcementand anchors in the plastic material from which the grinder Wheel isformed.

In detail, A is an open mesh metallic reinforcement and B are the nutmembers provided with a central threaded aperture G and a tapering orWedge shaped peripheral portion. In combining these elements, the nuts Bare first positioned in proper relation to each other and the member Ais then secured thereto, preferably by Welding as indicated at thepoints D. The combined element is then imbedded or molded into theabrasive body E so that the rear faces of the nuts B tallicgeinforcementserves to distribute the stresses from the individual nuts B into thewhole body of the wheel. On the other hand, as the nuts 13 are clampedto the backing plate 1 stresses developed by centrifugal action areresisted not only by the tensile strength of the reinforcement A butalso by its attachment to said backing plate. Thus the whole structureis much stronger than one in which the securing nuts and the reinforcingmember are not rigidly connected.

\Vhat I claim as my invention is:

1. In a grinding wheel, the combination of an open mesh metallicreinforcement, an anchor member rigidly attached thereto and an abrasivebody in which both of said members are imbedoled;

In a grinding wheel, the combination of an open mesh metallicreinforcing member, a plurality of anchor members rigidly attachedthereto and an abrasive body in which all of said members are imbedded.

3. In a grinding wheel, the combination of an open mesh metallicreinforcing member, a series of anchor members "welded thereto and anabrasive body in which all of said members are imbedded.

ALAN P. BEEBE.

